Pressure-regulating device.



H. R. BIOKPORD PRESSURE REGULATING DEVICE.

APPLICATION FILED JULY 2a, 1913.

1,1 03,474. 4 Patented July .14, 1914,

VITNESSES: II; VENTOR ATTORN lzY a citizen of the United HENRY B.BICKFORD, OF MONTEREY, CALIFORNIA.

rnnssUaE-Rneumrme nnvicn.

Specification of Letters Patent.

Patented July .14, 1914.

Application filed July 23, 1913. Serial No. 780,668.

To all whom it may concern Be it known that 1, HENRY R. BICKFORD,States, residing at Monterey, in the county of Montereyand State ofCalifornia, have invented new and useful Improvements inPressure-Regulating Devices, of which the following is a specification.

This invention relates to a pressure regulating device.

The purpose of this invention is to provide a simple, substantial,cheaply manufacturedpressure regulating device which is especiallyadapted to be used in connection with tire inflating pumps or likedevice.

. tomatically shutting the construction and s The object of thisinvention is to construct a simple device of the kind described, whichwill not only register the pressure, but which is also provided withmeans for anofl the air the moment the required pressure-has beenobtained.

Av further object is to so construct the device that it can readily beset to operate at predetermined pressures and automatically shut ofl theair supply when such preexceeded. The invention consists of the partsand combination of parts as hereinafter more fully described andclaimed, having reference to the accompanying drawings, in which"-"--Figure 1 is a side elevation partly broken away. Fig.2 is an ,end viewof same.

Referring to Fig. 1 of the drawings, A

indicates a cylinder having a head 2 at one end and a suitable valveconnection 3 at the other end connected with the piston 4,. slidablymounted within the cylinder. Projecting through the head 2 a suitabledistance is a rod 5, the outerendof which is threaded, as at'6, for thepurpose of receiving an adjusting screw coil spring 8, the function ofwhich-will be later described.

Secured to one end of the cylinder, as at 9, is a suitable form of aircontrolling valve 10 provided with a controlling or operating lever 11which is normally adapted to assume a position practically parallel withthe cylinder A when the valve is open.

'the rod 5, with interposed between 4 Interposed ,der and the piston,

' between the piston land the head 2 is a and tire valve connection 3 toinflate thev tire. I

Pivotally mounted, as at 13, upon a bracket 14 suitably secured to theend of the cylinder-isa trigger arm 15,'the outer end of which isnotched, as at 16, for the purpose of receiving and retaining the outernotched end 17 of the valve controlling lever 11. A spring 19 connectsthe trigger arm 15 and a projecting supplementary arm 18 formed on thelever 11. This spring 19 is provided for the purpose of holding thetrigger in engagement with relation to the notched end of the arm 11.

Suitably secured to the outer end of the threaded rod 5 is a pointer orpressure indicating arm 20, which is guided, as at 21, upon abracket 22secured upon the cylinder A. The inner end of the indicator arm 20 isprovided with a pointer 23, which is so positioned as to register-with'ap'res sure scale or similar device 24 suitably secured or otherwiseformed on the outer surface of the cylinder A. I

The threaded rod 5 is secured to the piston 4 withinthe cylinder,together with the adjusting screw 7, 'and the coil spring 8 is providedfor the purpose of regulatin or predeterminin the pressure to which 1tis desired to in ate' the tire. For instance, if it is desired toinflate the tire to not exceed 80 pounds pressure, it is only necessarvto move the adjusting screw 7 until connected piston, is moved that thepointer will indicate 80 pounds. The movement of the piston, withrelation to the coil spring 8' the head of the cylinis'thus transmittedto spr1ng8 to such a tension into such a position compress the coil thatthe piston will not be actuated by the air pressure within the cylinderuntil 80 pounds pressure has been exceeded.

The operation of the device will be as follows: When it is desired toinflate the tire, it is only necessary to place the connection 3 on topof the tire valve (not here shown).

The air is then admitted from any suitable source (not here shown) andallowed tojpass through the hose 12, valve 10, cylinder A, andconnection 3 to inflate the tire. The

' moment the tire has been inflated to 80 pounds pressure suificientback pressure will e created in the cylinder to move the piston in anoutward direction, This movement of the pis ton will instantly betransmitted through therod 5 and adjusting screw 7 to lift the triggerarm out of engagement with the notched end17 of the valve controllinglever 11. The moment the trigger has been lifted out of' engagement withthe the tire and accidental blow-outs of this n tched end of the arm'11, it will be seen that the tension of the spring 19 will be instantly1 transmitted through the supplementarylever extension 18 to throw thearm 11 into the dotted line position indicated at 25,-when'the airsupply. will be instantly shut 015?. It is thus impossible to overchargenature are entirely obviated, as the air su ply is automatically'cut offthe moment t e tire has been charged to the predetermined pressure.

' By constructing a pressure regulatin deviceas here shown it is notonly possib e to automatically shut off the ,air supplied the moment thedesired pressure has been obtained, but it is-also possible to regulatethe point of cut ofi to suit'va'rious pressures, this being accomplishedby simply adjusting the tension of the coil spring'8 and the pressurebeing automatically indicated by the sliding point. or indicator;

A'd'evice constructed as here shown is simple'and compact inconstruction and reliable and automatic in action; The materials andfinish of the several parts of the apparatus are such as experience andjudgmeht of the manufacturer may dictate.

-' 'I wishit understood that the device may be installed in any suitableposition between the source of pressure supply and the tire'infiatingvalve, and that any suitable tire valve connection besides the one hereshown may be employed.

Having thus described my invention, what -I,'claim and desire to, secureby Letters Patent is-' v p 1'. The combination in a pressure regulat-'ing device, of a cylinder, a valvecontrolled inlet and outleton saidcylinder, a slidably mounted piston within said cylinder ada ted to 'beactuated by, air pressure 'adinltted through the inlet, a rod secured tothe "iston gh dne end of the cylmder,

extending throu a trigger armpivotally secured to the cylilid'er adaptedto be actuated by said-resend piston, an operating lever secured to thevalve adapted to'be normally secured by the triggerarmto hold I thevalve in an'o'pen position, and a spring connectlng the valve lever andtrigger forthrowing this valve into a closed position when released bythe trigger arm. Y

2. .The combination in a pressure regulating device, of a cylinder, avalve controlled Y inlet and outlet mounted piston within said cylinderadapted to be actuated by air pressure admltted coil spring interposedbetween one end of the cylinder and the pistonja-pressure regulating nuton the rod for regulating the tension of said spring, a trigger armivotally secured to the cylinder adapted to be lifted by said nut, anoperating lever secured to the valve, the outer endof which isadapted'to on said cylinder, a slidably.

through the inlet, a rod secured to the piston extending through one endof the cylinder, 21

be normally thrown into engagement. with the trigger armto hold thevalve in an open p'ositlon, a spring connecting the valve lever andtrigger arm adapted to throw the valve into closed position when thevalve lever is released by the trigger arm, and means for indicating thepressure within the cylinder themoment the valve is closed. i g 3. Thecombination in a pressure regulating device, of a cylinder, a valvecontrclled inlet andoutlet on said cylinder, a slidably Q mounted pistonwithin saidcylinder adapted to be actuated I by air pressure admitted 1position, a spring connecting the valve lever l and trigger arm adaptedto throw the valve into closed position when the valve lever is releasedby the trigger arm, a pressure Jindieating scale formed on the outercylinder surface, and means connected with the piston and rod and adated to move in unison with same for indicating the pressure" within the1 cylinder. i 4; The combination in a pressure regulatiing device, ofa'cylmder,

a valve controlled mounted piston within said cylinder ada ted ;to beactuated by air pressure admitted ithrough the inlet,'a pistonrodsecuredto said p1ston,'a spring interposedvbetween one end ofthecylinder-- and'the piston to ,prevent air under pressure admittedthrough the inlet from moving the piston until afpredespring pressed,valve-controlling lever, a

latch arm engaging therewith and-disenthe trigger arm to hold the valvein an open.

{inlet and outlet on said cylinder, a slidably terinined i pressure hasbeen obtained, a

piston, and a nut adjustable on the piston rod, and engaging the latcharm to release the valve-controlhng lever, so that the Valve 5 may beelosed when a definite pressure in the cylinder is reached.

In testimony whereof I have hereunto set gageable by the outwardmovement of the my hand in the presence of two subseribing v witnesses.we

HENRY R. BICKFORD.

Witnesses FRED A. TREAT,

W. G. HUDSON.

